package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Slf4j
@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }


    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void insert(EmployeeDTO employeeDTO) {
        //创建Employee对象。这个对象将存入数据库中
        Employee employee = new Employee();

        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO, employee);

        //设置employee基础属性（前端未传递的那些）
        //设置账号状态
        employee.setStatus(StatusConstant.ENABLE);
        //设置初始密码（md5加密）
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        /*//设置创建时间&修改时间
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        //设置当前记录创建id和修改人id
        //通过线程存储空间获取id
        Long empId = BaseContext.getCurrentId();
        employee.setCreateUser(empId);
        employee.setUpdateUser(empId);*/

        employeeMapper.insert(employee);
    }


    /**
     * 分页查询员工
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageSelect(EmployeePageQueryDTO employeePageQueryDTO) {
        //获取并设置默认分页查询参数
        int page = employeePageQueryDTO.getPage();
        int pageSize = employeePageQueryDTO.getPageSize();
        if (page == 0)
            page = 1;
        if (pageSize == 0)
            pageSize = 10;
        //设置分页查询参数
        PageHelper.startPage(page, pageSize);
        //执行全部查询操作，并且通过分页插件实现分页查询
        Page<Employee> p = employeeMapper.list(employeePageQueryDTO);
        log.info("查询的数据为:{}", p.getResult());
        return new PageResult(p.getTotal(), p.getResult());
    }


    /**
     * 员工账号状态修改
     * @param status
     * @param id
     */
    @Override
    public void accountModify(Integer status, Long id) {

        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                .build();
        employeeMapper.update(employee);
    }


    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @Override
    public Employee selectById(Integer id) {
        Employee employee = employeeMapper.selectById(id);
        return employee;
    }


    /**
     * 员工修改
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        //创建Employee对象。这个对象将存入数据库中
        Employee employee = new Employee();

        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO, employee);

        /*//设置修改时间
        employee.setUpdateTime(LocalDateTime.now());
        //设置修改人id
        Long empId = BaseContext.getCurrentId();
        employee.setUpdateUser(empId);*/

        employeeMapper.update(employee);
    }


    /**
     * 根据id删除员工
     * @param id
     */
    @Override
    public void delete(Long id) {
        employeeMapper.delete(id);
    }

}
